Motorcycle production in the 1950s

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mikeyboy
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Re: Motorcycle production in the 1950s

Post by mikeyboy » Sat Aug 15, 2015 3:00 pm

bull wrote:
moto al wrote:
image_2015-08-15-2.jpg
]

and it would be interesting to know what job is been done to the piston in that picture
Screwing cylinder studs in
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bull
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Re: Motorcycle production in the 1950s

Post by bull » Sat Aug 15, 2015 5:18 pm

clutchspring wrote:I would say the men are brazing or welding the swinging arms together.

Ian


well, it looks like that at first glance

but, I have never seen sparks like that come from gas welding or any welding, where the sparks come out looking like solid strings of cord or rope

but then, if it is welding of some kind, the flash looks high, and their are not wearing any dark goggles or mask

I don't know

bull
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Re: Motorcycle production in the 1950s

Post by bull » Sat Aug 15, 2015 5:34 pm

bull wrote:
moto al wrote:
image_2015-08-15-11.jpg





it could be a lathe of some kind their using

Boo Cock
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Re: Motorcycle production in the 1950s

Post by Boo Cock » Sat Aug 15, 2015 7:42 pm

Slow camera shutter speed, hence long sparks.

bull
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Re: Motorcycle production in the 1950s

Post by bull » Sat Aug 15, 2015 8:38 pm

Boo Cock wrote:Slow camera shutter speed, hence long sparks.


well maybe,

its probably Tig welding

anyway, whats with the big chimney pipe coming out the back of the bench

Earwig
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Re: Motorcycle production in the 1950s

Post by Earwig » Sat Aug 15, 2015 8:43 pm

bull wrote:
moto al wrote:
image_2015-08-15-2.jpg
]

and it would be interesting to know what job is been done to the piston in that picture
Not the piston .... he is putting he studs in

Allan F
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Re: Motorcycle production in the 1950s

Post by Allan F » Sat Aug 15, 2015 9:16 pm

Putting the barrel / cylinder head studs in by the looks of it.

900Fantrider
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Re: Motorcycle production in the 1950s

Post by 900Fantrider » Sun Aug 16, 2015 6:56 am

Thanks Al, It is indeed one of the the Jawa factories producing the 250/350 twinport, single but with twin exhaust ports/pipes. They could be from the 60`s as it remained the same for a few decades before moving it all to India to produce Jawa Yezdi!
The pics made me search my Dads bike library because i knew Id come across this before.
Jawa 350
jawa07062006.jpg
jawa07062006.jpg (74.55 KiB) Viewed 402 times
One of the Factories in recent years.
ab5f0a4328e70250cad5acd6fb873ba5.jpg
ab5f0a4328e70250cad5acd6fb873ba5.jpg (65.29 KiB) Viewed 402 times
Pics stolen from the net but I may be able to scan some more in.

cheers Marc
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Simon_100
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Re: Motorcycle production in the 1950s

Post by Simon_100 » Sun Aug 16, 2015 6:59 am

bull wrote:it reminds me of the old Gramophone, so it does
That's what gave me the idea - and it was Music While You Work



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Regs

Simon
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AndyB
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Re: Motorcycle production in the 1950s

Post by AndyB » Sun Aug 16, 2015 7:20 am

bull wrote:
Boo Cock wrote:Slow camera shutter speed, hence long sparks.


well maybe,

its probably Tig welding

anyway, whats with the big chimney pipe coming out the back of the bench
They're gas welding, you can see the hoses going to the torch and the pipe coming out of the bench is for fume extraction. The welders are wearing dark glasses rather than goggles or a full shield but the flash from oxy-acetylene welding wouldn't give them arc eye anyway. The sparks are probably caused by the flux they're using but I've not done any gas welding since I was an apprentice and that's a long time ago :pinch:

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